EP1154894B1 - Procede et appareil de fabrication d'une chenille de tracteur sans fin en caoutchouc - Google Patents

Procede et appareil de fabrication d'une chenille de tracteur sans fin en caoutchouc Download PDF

Info

Publication number
EP1154894B1
EP1154894B1 EP99963024A EP99963024A EP1154894B1 EP 1154894 B1 EP1154894 B1 EP 1154894B1 EP 99963024 A EP99963024 A EP 99963024A EP 99963024 A EP99963024 A EP 99963024A EP 1154894 B1 EP1154894 B1 EP 1154894B1
Authority
EP
European Patent Office
Prior art keywords
belt
molding
segments
uncured
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99963024A
Other languages
German (de)
English (en)
Other versions
EP1154894A1 (fr
Inventor
Louis T. Fike
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goodyear Tire and Rubber Co
Original Assignee
Goodyear Tire and Rubber Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Publication of EP1154894A1 publication Critical patent/EP1154894A1/fr
Application granted granted Critical
Publication of EP1154894B1 publication Critical patent/EP1154894B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/027—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles having an axis of symmetry
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/08—Toothed driving belts
    • B29D29/085—Double-toothed driving belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material

Definitions

  • the present invention relates generally to the molding of vehicle supporting elements formed of rubber and more particularly, to a system for molding rubber tractor tracks in an endless configuration.
  • Rubber tractor tracks are in many cases being substituted for conventional metal tractor tracks. Rubber tractor tracks offer better maneuverability, better ride quality in rough fields, better flotation in wet fields, improved side hill stability, excellent traction, low maintenance and versatility compared to steel tractor tracks. Additionally, rubber tracks are replacing conventional rubber tires on tractor and other agricultural vehicles such as combines, trenchers, snow removers, spreaders, sprayers, wagons and carts, since rubber tracks are more friendly to agricultural fields, offer better flotation and less compaction than rubber tires, resulting in better crop yield. The use of rubber tractor tracks permits farmers to get out into the fields earlier in the planting season and plant more crops as compared to rubber tire-equipped agricultural vehicles.
  • Rubber tractor tracks are defined by an endless rubber belt reinforced with continuous flexible steel cables bonded into the rubber. With present commercial methods, a complete rubber tractor track is molded flat in quarter sections which are sequentially then bonded together during the curing process. In practice, the joint between the bonded-together sections tend to break in use. Additionally, the joint between the bonded-together ends is of a different cross-sectional dimension than the cross-sectional dimension of the major portion of the track length. Accordingly, during movement of the track-supported vehicle, the vehicle is subject to severe vibrations. Such vibrations are not only harmful to the vehicle, but also to pavement over which the vehicle is moved. Additionally, such vibration is annoying to the vehicle operator.
  • Another method involves building a complete track using a drum. Uncured or cured lugs are first manually clamped within pockets formed in the drum. Next, uncured rubber, calendered cord and wire cable are wrapped around the outside of the drum. Preformed uncured treads are then stitched onto the uncured rubber. The drum is then disposed within an autoclave to cure the rubber and the parts attached thereto. The drum is then collapsed to remove the completed track. Since only low pressure can be applied the cured rubber is of a low density with resulting low strength. Also, the track lugs and treads are not generally integrally bonded to the rubber and are displaced during use.
  • an apparatus for molding an endless tractor track comprising a molding press having a plurality of horizontally movable outer molding segments formed with tread defining recesses on this inner portion.
  • the apparatus further has a plurality of inner molding segments, a means to urge these segments outwardly and a belt handler for positioning an uncured belt outwardly of the inner molding segments.
  • the method and apparatus for molding rubber tractor tracks of the present invention effects complete molding of an entire rubber track in an endless configuration of uniform thickness so as to eliminate any discontinuity in cross-section along the length of the rubber track.
  • a rubber track embodying the present invention eliminates the vibration created by the bonded-together sections of a conventional rubber tractor track during vehicle movement.
  • a rubber tractor track embodying the present invention is not subject to breakage as in the case of a conventional rubber tractor track formed of bonded-together sections.
  • a rubber tractor track made in accordance with the present invention is completely integral with respect to the lugs and treads whereby the lugs and treads will not become separated from the track.
  • Another advantage of the method of molding rubber tire tracks embodying the present invention is the reduction in manufacturing time and cost afforded by such method, as compared to the prior art methods described above.
  • This advantage is broadly achieved by molding an initially uncured belt, securing drive lugs to the inner periphery of the uncured belt, inserting the uncured belt and its drive lugs into a molding press, heating the molding press to mold treads on the outer portion of the belt while forming and bonding the drive lugs to the inner portion of the belt, and then removing the cured belt and its drive lugs from the molding press.
  • the apparatus of the present invention includes a molding press having a lower platen that includes plurality of horizontally movable outer molding segments formed with tread-defining recesses on their inner portions, and a plurality of horizontally movable inner molding segments, each molding segment having drive lug cavities that initially removably hold rough-formed drive lugs.
  • the apparatus also includes a belt handler for positioning an uncured belt within the confines of the outer and inner molding segments, a power-operated drive lug loader to urge the drive lugs radially inwardly to further form and secure the drive lugs against the inner periphery of the uncured belt, power-operated means on the lower platen to urge the outer molding segments against the outer surface of the uncured belt, backing means on the molding press top to restrain the inner and outer segments against separation.
  • Heating means on the molding press effects curing of the belt between the inner and outer molding segments while forming the treads on the outer surface of the belt and final forming and bonding the drive lugs onto the inner portion of the belt.
  • the belt handler removes the cured belt from the lower platen.
  • a completed rubber track T made in accordance with the method and apparatus of the present invention.
  • Such track T comprises an endless band 30 formed of rubber 31 and calendered cord and wire cable 32 embedded in band 30.
  • Such track T is adapted to be positioned upon the wheels and rollers of a motorized vehicle (not shown), such as a tractor or the like to support such vehicle for movement along a desired surface, such as an agricultural field.
  • the exterior surface of band 30 is formed with integral treads 34.
  • the mid portion of the interior periphery of band 30 is formed with a plurality of drive lugs or guide lugs 35 which engage complimentary sprockets (not shown) on the wheels or rollers of the vehicle which is supported by track T.
  • Track T of Figs. 28, 29 and 30 is formed by the apparatus shown in Figs. 1 through 27, 31 and 32.
  • a molding press gantry MG horizontally movable along the floor C.
  • the major components of the track forming apparatus embodying the present invention includes a molding press having a lower platen, generally designated 40, and a mold top member, generally designated 42, a belt handler BH carried by a jib crane JC and a drive lug drum D and drive lug loader L and a second jib crane JC-2.
  • the molding press gantry MG effects vertical and horizontal movement of the molding press top member 42 relative to the molding press lower platen 40.
  • Belt handler BH is swung from a first position over a conveyor belt 44 to a second position aligned with lower platen 40 so as to move uncured belts 45 from the conveyor belt into the lower platen. After a molding operation, belt handler BH removes a cured tractor track T from the lower platen 40 to a position over the conveyor belt 44 to transfer a cured track T onto the conveyor belt.
  • molding press gantry MG is of conventional construction having crossbars which support, vertical, like, equidistantly spaced electric motor driven-lifting screw rods 46. Another electric motor drives rollers 48 which ride on rails 49 secured to columns 50.
  • lower platen 40 is disposed within a depression formed in floor C and includes a base 54.
  • a plurality of like, outer hydraulic cylinder and plunger closing units 58 extend upwardly from the sides of the lower platen 40.
  • the molding press top 42 is lifted onto and off of the lower platen by the vertically reciprocal lifting screw rods 46 of gantry MG.
  • a plurality of horizontally extending fluid actuated cylinder and plunger units 71 are secured to the lower platen 40 to effect horizontal movement of a plurality of outer molding press segments 72 which are secured to frusto-conical steel heat-transfer hollow cones 73 relative to the floor of the lower platen.
  • a plurality of outer hollow outer backing cones 74 and inner backing cones 74A depend from the underside of press top 42 (Fig. 15).
  • the inner surface of each of the molding press segments 72 is formed with recesses R which shape the treads 34 of the completed tractor track T.
  • the upper ends of the plungers of the closing cylinder and plunger units 58 are formed with knobs 76 which are releasably locked within complementary sockets 78 formed in blocks 78A supported on the outer periphery of mold top 42.
  • a plurality of fluid-operated locks 79 arranged around the periphery of the mold top each includes a conventional fluid-actuated cylinder 80 that moves a U-shaped horizontal plate 81 towards and away from the underside of the knobs 76 to connect and disconnect the cylinder and plunger units 58 to the mold top 42.
  • Locks 84 include U-shaped plates 86 that are extended over the lower end of lifting screw rods 46 to engage an enlargement 46A formed on the lower end of the lifting screw rods 46 by means of conventional fluid-actuated horizontal cylinder and plunger units 87.
  • the belt handler BH includes four vertical retractable fingers 90 horizontally slidably carried by horizontal X-shaped carrier 92.
  • the upper end of each retractable finger 90 is horizontally slidably supported on one leg of the carrier. Movement of the fingers 90 is effected by conventional fluid-actuated cylinder and plunger units 94.
  • a lifting screw rod 96 is rigidly secured to the center of carrier 92.
  • the upper end of lifting screw 96 is threadably connected to a electric motor-driven nut member 101 (Fig. 1) secured to the free end of the boom of jib crane JC that supports the belt handler whereby rotation of the nut member effects vertical reciprocation of the lifting screw rod 96.
  • the outer surface of each of the fingers 90 is formed with a drive lug pocket 104.
  • the lower end of each finger is formed with a lip 106 that engages and supports the lower end of an uncured belt 45.
  • lower platen 40 includes a circumferentially arranged plurality of truncated frusto-conical hollow narrow segments N and wide segments W secured to and supported by hollow cones NF.
  • Each segment has an upwardly and outwardly sloping inner surface and a vertically extending outer surface.
  • the segments are formed of a metal having a high coefficient of thermal expansion such as aluminum or a combination of aluminum and steel.
  • the mid-portion of the outer surface of each segment is formed with a drive lug cavity 112 which removably receives a rough-formed drive lug 35.
  • the bottom of each narrow segment N is secured upon a shoe 114 having a bracket that extends through an opening 115 in the floor 116 of base 120 of the lower platen 40.
  • each shoe bracket is secured to the plunger of a conventional fluid-actuated horizontally extending cylinder and plunger unit 122 having its outer end affixed to the inner periphery of the base 120.
  • the wide segments W that removably hold an uncured drive lug 35 are similar in construction to the narrow segments and each are secured upon a shoe having a bracket that extends through floor opening 115.
  • drive lug drum D is carried by cross-arms 140 which are centrally secured to an axle 142.
  • the periphery of drum D is formed with a plurality of drive lug - receiving apertures 144 that removably receive rough-formed uncured drive lugs 35.
  • Drum D is initially disposed in a vertically extending position shown in Figs. 1 and 7 through 10 wherein drive lugs 35 are urged into apertures 144 by a power-operated plunger 146 as shown in Fig. 10 after being positioned in alignment with such apertures by a conveyor belt 148 (Fig. 7).
  • the drive lugs may be inserted into the apertures manually.
  • the drive lug drum D is swung into a horizontal position shown in Fig. 2 by jib crane JC-2.
  • the free end of such crane is provided with a vertical electric motor-operated lifting screw 150 disposed within a box 152.
  • the lower end of lifting screw 150 is formed with a groove 154 that is selectively engaged with a pin 156 that is horizontally movable by a power-operated cylinder 157 (Figs. 1, 11 and 12).
  • drive lug loader L includes a double-walled ring 160 that supports a plurality of horizontally extending fluid-operated cylinder and plunger units 162. Ring 160 also carries a fluid-actuated lock 164 for releasably securing the ring to drive lug drum D.
  • the drive lugs 35 may be supplied to the drive lug loader in a dimensionally more finished condition than shown in Figs. 7-10. In this case, it would not be necessary to change the configuration of such drive lugs before the track molding step.
  • jib crane JC-2 positions drive lug loader D with its drive lug-loaded drum D over lower platen 40 (Fig. 11), and then downwardly into the confines of the lower platen.
  • the drive lugs 35 are then positioned within the drive lug cavities 112 of the inner segments N and W by cylinder and plunger units 162 as shown in Fig. 12. Thereafter, drive lug loader D is withdrawn from the lower platen.
  • the drive lugs 35 are rough-formed with dimensions and volume that permit them to properly interfit with the drive lug drum apertures 144 and drive lug cavities 112.
  • fingers 90 of belt handler BH are retracted and the belt handler is lowered into an uncured belt.
  • the four fingers 90 are then extended into engagement with the interior of the belt 45 and the belt is transferred from the conveyor belt to a position within lower platen 40 by jib crane JC.
  • the inner segments W are extended to hold the belt, then the movable fingers 90 of the belt handler are then retracted by means of fluid actuated cylinder and plunger units 96.
  • the belt handler is then lifted out of the lower platen (Fig. 14) and inner segments N are extended.
  • the molding press gantry MG will horizontally move the mold press top 42 to a position coaxial with the lower platen 40, and the lifting screws 46 of the mold press gantry MG lower the molding press top downwardly toward the lower platen 40 until the sockets 78 encompass knobs 76 of the cylinder and plunger units 58 (Fig. 17A).
  • the U-shaped plates 81 are then advanced into a locked position below the knobs.
  • the lifting screw rods 46 are disconnected from the molding press gantry by locks 79.
  • the outer cylinder and plunger units 58 now urge mold top 42 into the lower platen 40 to close the molding press, and its outer segments as shown in Figs. 15 and 16.
  • outer cones 74 cam the matrix cones 73 inwardly to urge the outer segments 72 into contact with the outer surface of uncured belt 45 (Fig. 16).
  • segments N and W are at about room temperature. Accordingly, segments N and W provide adequate clearance 3 mm to 6 mm (1 ⁇ 8" - 1 ⁇ 4") to admit the uncured belt 45 and drive lugs 35.
  • the outer cones 73 and hence outer molding press segments 72 will have been heated by steam or hot water through passages 72A to a desired temperature, and will remain heated during subsequent belt curing operations.
  • the narrow and wide inner segments N and W will then be heated by steam through special fittings shown in Figs. 19 and 20, described hereinafter so as to apply outward compressive force against the uncured belt 45, since the heated segments expand towards one another.
  • the inner and outer backing cones 74 and 74A of the mold top restrain the inner and outer segments against relative horizontal movement. Thermal expansion of the inner and outer segments towards one another compresses and cures the belt 45 while forming treads 34 in the outer periphery thereof. At the same time, the drive lugs 35 are finally formed and cured and integrally bonded to the inside periphery of the belt (Fig. 12), and the calendered cord and wire cable 32 is bonded to the rubber.
  • the mold top 42 is lifted upwardly out of the lower platen 40 by the outer cylinder and plunger units 58. Then the mold gantry MG returns the mold top to its original position of Fig. 1 by lifting rods 46 .
  • the outer molding press segments 72 are retracted (Fig. 23). The cured belt T is in tight contact with the inner segments N and W at this time.
  • Cool water is then forced into one or more of the segments N and W by fittings F of the type shown in Figs 19 and 20 so as to cause such segments to shrink slightly away from the belt's inner periphery.
  • the narrow segments N are then retracted by cylinder and plunger units 122 until there is sufficient clearance for the belt handler fingers 90 to be lowered into position and engage the cured belt T (Fig. 24).
  • Wide segments W are then retracted by cylinder and plunger units 122, as shown in Fig. 25, so as to free the cured track T.
  • Belt handler BH is then actuated to remove the cured track T from the lower platen and swing such track onto conveyer belt 44 by the boom of jib crane JC.
  • the facing surfaces 172 and 174 of the narrow and wide segments N and W taper radially inwardly and outwardly at an angle A.
  • outward extension of the narrow segments N will urge the wide segments W tightly into a complete circle when the segments contact the inner periphery of an uncured belt.
  • such taper assists in retraction of the narrow segments.
  • Fitting F includes a pipe 176 attached to a boss 178 that is threaded to the floor of the mold bottom 40 coaxial with aperture 171 of the latter.
  • Boss 178 has a cavity 180 wherein is slidably disposed a sleeve 182.
  • Sleeve 182 is biased upwardly by a coil spring 184 relative to cavity 180.
  • An O-ring 181 is carried by the upper end of sleeve 182. Stop screws 185 limit upward movement of sleeve 182.
  • Figs. 31 and 32 there is shown a modification of the molding press shown and described hereinbefore with like elements bearing primed reference numerals.
  • Such modification is adapted for use in forming larger, wider, or heavier rubber tracks, and the molding press will generally be of increased weight as compared to the molding press shown and described hereinbefore.
  • the lower platen 210 of the molding press is supported upon a cylindrical concrete base 200 which surrounds a cylindrical steel shell 202 having its upper end secured to the underside of the base.
  • Shell 202 coaxially supports a shaft 204 that vertically slidably engages a bore 206 formed in the lower portion of a guide post 208 which extends upwardly through the lower platen 210.
  • the top of the guide post 208 is secured to a locking barrel 212 to centrally align sleeve 214 of mold top 215 with the lower platen.
  • Locking barrel 212 is formed with a groove 216 that removably receives a pair of U-shaped locking plates 218 and 220 which are moved towards and away from groove 212 by horizontal fluid-actuated cylinder and plunger units 222 and 224 to secure mold top 215 to guide post 208.
  • guide post 208 is fixed to a bracket 226 which carries a plurality of vertical fluid-actuated pull-down cylinder and plunger units 228.
  • the upper ends of such cylinders are secured to the underside of the lower matrix 210.
  • the operation of the modified molding press is similar to that of the molding press of Figs. 1-27.
  • the outer cylinder and plunger units 58 raise the mold top 42' away from the lower matrix 210 after a molding operation has been engaged by the molding press lifting screw rods (Fig.31). Both the outer cylinder and plunger units and the inner pull-down cylinder and plunger units pull the mold top downwardly into a closed position (Fig. 32).
  • the aforedescribed apparatus and method will produce an endless rubber tractor track of uniform cross-section which eliminates excessive vibration and remains integral during use over a long service life. Production of such rubber tractor tracks can be accomplished in a minimum amount of time and at a comparative low cost compared to existing rubber track making systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Tyre Moulding (AREA)

Abstract

L'invention concerne un procédé et un appareil de moulage d'une chenille (T) sans fin de tracteur à partir d'une ceinture (30) non durcie et d'une pluralité de barrettes, lequel procédé consiste à pousser les barrettes dans des cavités (104) formées dans les segments intérieurs d'une presse (40) à empreinte, à leur donner une forme presque final et à les comprimer sur le pourtour intérieur de la ceinture. La ceinture et les barrettes sont ensuite positionnées dans la presse à empreinte pour être durcies et moulées pendant que les bandes de roulement (34) sont formées sur le pourtour extérieur de la ceinture. Les barrettes prennent leur forme finale et la ceinture terminée est refroidie et extraite de la presse à empreinte.

Claims (8)

  1. Appareil pour mouler une chenille de tracteur sans fin (T) comportant des bandes de roulement (32) sur sa portion externe, à partir d'une ceinture (30) à l'état non vulcanisé et de plusieurs barrettes d'entraínement (35) grossièrement formées à l'état non vulcanisé, ledit appareil comprenant :
    une presse de moulage comportant plusieurs segments de moulage externes (72) aptes à se déplacer en direction horizontale, dans lesquels sont pratiqués des évidements R définissant une bande de roulement, sur leurs portions externes, ladite presse de moulage possédant également plusieurs segments de moulage internes N et W aptes à se déplacer en direction horizontale ; et
    un moyen de chauffage sur la presse de moulage pour mettre en oeuvre la vulcanisation des ceintures entre les segments de moulage internes et externes, l'appareil étant caractérisé par :
    un segment de moulage interne possédant une cavité destinée à des barrettes d'entraínement, qui retient dans un premier temps de manière amovible une barrette d'entraínement (35) ;
    un dispositif de chargement de barrettes d'entraínement L, dans lequel sont pratiqués plusieurs orifices (144) dans lesquels viennent se loger de manière amovible les barrettes d'entraínement (35) ;
    un moyen commandé par un moteur sur le dispositif de chargement de barrettes d'entraínement L qui force les barrettes d'entraínement (35) à l'extérieur des orifices (144) dans les cavités (112) destinées aux barrettes d'entraínement ;
    un dispositif de manipulation de ceinture BH destiné à disposer en position coaxiale une ceinture (30) à l'état non vulcanisé à l'extérieur des segments de moulage internes du dispositif de chargement de segments ;
    un moyen commandé par un moteur sur la presse de moulage, destiné à presser les segments de moulage internes vers l'extérieur dans le but de soumettre à un façonnement partiel final et de retenir les barrettes d'entraínement contre la périphérie interne de la ceinture à l'état non vulcanisé ; et
    dans lequel le moyen de chauffage sur la presse de moulage met en oeuvre la vulcanisation de la ceinture entre les segments de moulage internes et externes N et W (72), tout en formant les bandes de roulement sur la surface externe de la ceinture (30) et en soumettant les barrettes d'entraínement (35) à un façonnement final et en les collant à la paroi interne de la ceinture (30).
  2. Appareil selon la revendication 1, dans lequel la presse de moulage englobe un moyen pour comprimer la ceinture 30 à l'état non vulcanisé entre les segments internes et externes N, W (72) lors de la mise en service du moyen de chauffage.
  3. Appareil selon la revendication 1, dans lequel le dispositif de manipulation de ceinture BH englobe plusieurs doigts verticaux (90) qui sont à même de se rétracter de manière sélective, l'ensemble des doigts (90) entrant en contact de manière amovible avec la périphérie interne de la ceinture (20) dans le but de déclencher le mouvement de cette dernière par rapport à la presse de moulage.
  4. Appareil selon la revendication 1, qui englobe en outre un moyen F pour refroidir les segments de moulage internes avant la rétraction des segments de moulage internes N et W pour libérer la ceinture (30) à l'état vulcanisé.
  5. Appareil selon la revendication 4, dans lequel les segments internes N et W englobent de l'aluminium.
  6. Procédé de fabrication d'une chenille sans fin pour tracteur en utilisant l'appareil selon la revendication 1, la chenille sans fin pour tracteur possédant des bandes de roulement (32) sur sa portion externe, à partir d'une ceinture en caoutchouc (30) dans un premier temps non vulcanisée et de plusieurs barrettes d'entraínement non vulcanisées (35) grossièrement, ledit procédé englobant les étapes consistant à :
    charger le dispositif de chargement de barrettes d'entraínement L avec des barrettes d'entraínement ;
    positionner ledit dispositif de chargement de barrettes d'entraínement L en direction radiale à l'extérieur des segments de moulage internes N et W ;
    presser les barrettes d'entraínement (35) du dispositif de chargement de barèmes d'entraínement L dans les cavités (112) destinées aux barrettes d'entraínement des segments internes N et W ;
    positionner la ceinture (30) à l'état non vulcanisé entre les segments de moulage ;
    faire avancer les segments de moulage interne contre la périphérie interne de la ceinture non vulcanisée (30) dans le but de former en partie et de fixer les barrettes d'entraínement (35) à la périphérie interne de la ceinture (30) à l'état non vulcanisé ;
    chauffer les segments de moulage externe et interne dans le but de vulcaniser la ceinture (30), tout en moulant les bandes de roulement (32) sur la portion externe de la ceinture et en soumettant les barrettes d'entraínement (35) à un façonnement final et en les collant à la paroi interne de la ceinture (30) pour former la chenille de tracteur sans fin ; et
    retirer d'entre les segments de moulage la chenille de tracteur à l'état achevé.
  7. Procédé selon la revendication 6, dans lequel la ceinture (30) est comprimée entre les segments de moulage au cours de son chauffage.
  8. Procédé selon la revendication 6, qui englobe en outre le fait de refroidir les segments internes dans le but de les rétracter à l'écart de la ceinture (30) à l'état vulcanisé avant de retirer d'entre les segments de moulage (11) la chenille à l'état achevé.
EP99963024A 1999-02-19 1999-12-06 Procede et appareil de fabrication d'une chenille de tracteur sans fin en caoutchouc Expired - Lifetime EP1154894B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US253328 1981-04-13
US09/253,328 US6051178A (en) 1999-02-19 1999-02-19 Method and apparatus for making an endless rubber tractor track
PCT/US1999/028849 WO2000048826A1 (fr) 1999-02-19 1999-12-06 Procede et appareil de fabrication d'une chenille de tracteur sans fin en caoutchouc

Publications (2)

Publication Number Publication Date
EP1154894A1 EP1154894A1 (fr) 2001-11-21
EP1154894B1 true EP1154894B1 (fr) 2003-04-23

Family

ID=22959820

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99963024A Expired - Lifetime EP1154894B1 (fr) 1999-02-19 1999-12-06 Procede et appareil de fabrication d'une chenille de tracteur sans fin en caoutchouc

Country Status (11)

Country Link
US (1) US6051178A (fr)
EP (1) EP1154894B1 (fr)
JP (1) JP2002537161A (fr)
AU (2) AU6401299A (fr)
BR (1) BR9916933A (fr)
CA (1) CA2362347C (fr)
CO (1) CO5060524A1 (fr)
DE (1) DE69907277T2 (fr)
MX (1) MXPA01008277A (fr)
UY (1) UY26023A1 (fr)
WO (2) WO2000048825A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6554377B2 (en) 2001-07-19 2003-04-29 The Goodyear Tire & Rubber Company Rubber track and improved method and method for producing the track
AU2005220201B2 (en) * 2001-07-19 2007-08-02 Veyance Technologies, Inc. Mold for a rubber track
US20050051256A1 (en) * 2003-09-09 2005-03-10 Yovichin Albert James Method and apparatus for building and transferring a tread belt structure

Family Cites Families (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1579922A (en) * 1922-11-01 1926-04-06 Goodrich Co B F Method of manufacturing tires
US1779376A (en) * 1923-06-12 1930-10-21 Fisk Rubber Co Tire-forming machine
US1779377A (en) * 1926-08-23 1930-10-21 Fisk Rubber Co Tire-forming machine
US1665870A (en) * 1926-08-26 1928-04-10 Goodyear Tire & Rubber Shaping device
US1715973A (en) * 1927-07-30 1929-06-04 Morgan & Wright Method of and apparatus for manufacturing pneumatic tires
US1763589A (en) * 1927-11-18 1930-06-10 Goodyear Tire & Rubber Tire-forming machine
US1949443A (en) * 1930-12-12 1934-03-06 Morgan & Wright Tire shaping apparatus
US1986092A (en) * 1931-06-11 1935-01-01 Morgan & Wright Tire shaping machine
US2381395A (en) * 1943-07-08 1945-08-07 Firestone Tire & Rubber Co Vulcanizing mold
US2747225A (en) * 1951-10-25 1956-05-29 Pirelli Apparatus for shaping tire casings
US3222716A (en) * 1959-01-22 1965-12-14 Edward J Harris Tire curing press and unloading apparatus therefor
US3791897A (en) * 1971-06-16 1974-02-12 Bombardier Ltd Method and apparatus for making endless belts
IT1010109B (it) * 1974-04-26 1977-01-10 Pirelli Stampo per la fabbricazione di cinghie dentate a doppia denta tura e cinghe dentate cosi ot tenute
ZA742928B (en) * 1974-05-08 1975-08-27 W Stinnes Centrifugal moulding
US4184822A (en) * 1975-09-29 1980-01-22 The Gates Rubber Company Apparatus for making power transmission belting
CA1039467A (fr) * 1975-12-24 1978-10-03 Cedric W. Mcleod Presse a mouler
US4207052A (en) * 1976-07-16 1980-06-10 Caterpillar Tractor Co. Curing mold for curing replaceable tread and track belts
US4263083A (en) * 1979-07-20 1981-04-21 The Goodyear Tire & Rubber Company Building and curing an inextensible belt structure for a tire assembly
US4575438A (en) * 1980-11-19 1986-03-11 Ohio Machine Company, Inc. Tubeless tire curing method
JPS58163638A (ja) * 1982-03-25 1983-09-28 Mitsuboshi Belting Ltd ゴム製歯付ベルトの製造用組立モ−ルド
FR2571310B1 (fr) * 1984-10-04 1987-01-30 Michelin & Cie Bande de roulement prevulcanisee pour le rechapage des enveloppes de pneumatique et appareil pour produire un telle bande de roulement
WO1991004145A1 (fr) * 1989-09-18 1991-04-04 Herbert Clarence Spiller Moulage d'articles en plastique
IT1234666B (it) * 1989-09-21 1992-05-26 Mai Spa Procedimento per la realizzazione di cingoli in gomma e cingolo cosi' realizzato
US5204036A (en) * 1989-12-29 1993-04-20 Macmillan Kenneth T Method of molding tires
IT1244019B (it) * 1990-11-21 1994-06-28 Pirelli Transmissioni Ind Spa Procedimento ed impianto automatico per il controllo della qualita' e della produzione di cinghie per trasmissione.
IT1244635B (it) * 1991-03-26 1994-08-08 Firestone Int Dev Spa Metodo ed unita' per la rullatura di prodotti multistrato di materiale elastomerico allo stato crudo
JP2686375B2 (ja) * 1991-04-23 1997-12-08 三菱重工業株式会社 タイヤ製造装置
IT1250330B (it) * 1991-10-31 1995-04-07 Firestone Int Dev Spa Metodo per la realizzazione di una testa anulare di battistrada senza giunzione.
US5460771A (en) * 1992-10-16 1995-10-24 Itt Corporation Process for producing corrugated multi-layer tubing having layers of differing plastic characteristics
US5536464A (en) * 1994-11-15 1996-07-16 Bridgestone/Firestone, Inc. Apparatus and method for curing endless rubber track
US6086811A (en) * 1998-04-29 2000-07-11 The Goodyear Tire & Rubber Company Molding system for rubber tractor tracks

Also Published As

Publication number Publication date
EP1154894A1 (fr) 2001-11-21
US6051178A (en) 2000-04-18
WO2000048825A1 (fr) 2000-08-24
UY26023A1 (es) 2000-09-29
DE69907277T2 (de) 2004-02-05
CA2362347A1 (fr) 2000-08-24
AU6401299A (en) 2000-09-04
CO5060524A1 (es) 2001-07-30
JP2002537161A (ja) 2002-11-05
CA2362347C (fr) 2007-04-24
WO2000048826A1 (fr) 2000-08-24
AU758826B2 (en) 2003-04-03
DE69907277D1 (de) 2003-05-28
AU1934800A (en) 2000-09-04
MXPA01008277A (es) 2002-06-21
BR9916933A (pt) 2001-11-20

Similar Documents

Publication Publication Date Title
AU2002300014B2 (en) A rubber track and improved mold and method for producing the track
CA2351362C (fr) Procede et appareil de fabrication de chenilles de tracteurs integrees en caoutchouc
US6086811A (en) Molding system for rubber tractor tracks
EP0139050B1 (fr) Presse à pneus, chargeuse et procédé
EP1154894B1 (fr) Procede et appareil de fabrication d'une chenille de tracteur sans fin en caoutchouc
JP3693349B2 (ja) エンドレスのゴムトラックを硬化するための装置および方法
JP2000503607A (ja) エンドレスのゴムトラックを硬化するための装置および方法
JP4246862B2 (ja) タイヤ加硫機
US6716013B2 (en) Tear resistant shield for a tread segment of a segmented tire mold
DE602004013086T2 (de) Verbessertes Verfahren zum wechseln der Lauffläche eines sehr breiten Reifens
JP3810585B2 (ja) タイヤ加硫装置
US20020093125A1 (en) Automated process and apparatus for forming a molded article
CN215851305U (zh) 一种用于玻璃钢成型模具的转运装置
WO2000016969A1 (fr) Machine a rechaper les pneus
AU2005220201B2 (en) Mold for a rubber track

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010919

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 69907277

Country of ref document: DE

Date of ref document: 20030528

Kind code of ref document: P

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031206

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040126

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20031206

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20061201

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20061229

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080701

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20081020

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071231